Whale trapped in London’s Thames river may have to be euthanized, rescuers say

(CNN) — A young minke whale that has been stuck in London’s River Thames may have to be euthanized, according to rescuers.

The British Divers Marine Life Rescue (BDMLR) said the whale’s condition had “deteriorated rapidly” since it was stranded in the river and then freed by rescuers on Sunday.

The whale is now against the river wall. Rescuers expect it will become beached soon as the tide drops, BDMLR said in a statement Monday.

“BDMLR medics will try to position themselves to prevent the whale entering deep water again where it is now having difficulty swimming as its strength reserves seem to be compromised,” it said.

A veterinary team will be ready to euthanize the whale once it is beached to “end its suffering.” Their team will continue to care for it “under these sad circumstances,” it said.

The whale likely swam hundreds of miles before it was spotted around 7 pm local time on Sunday, stuck near Richmond Lock.

Once freed by BDMLR on Sunday night, the whale slipped away under cover of darkness before they could take further action, a spokesman for the Port of London Authority told CNN.

The rescue team “managed to get a special inflatable pontoon around (the whale), and then floated it out onto the main river,” spokesman Martin Garside told CNN. “At that point, the whale made its own decision and swam from the pontoon into the main river.”

The whale, estimated to be about 10 to 13 feet long, is far from its natural habitat.

“This species lives in the northern North Sea, so it’s very lost,” Garside said. “It’s a very young whale and it’s in a very dicey situation and its life is hanging in the balance.”

Minke whales can grow to weigh around 20,000 pounds and typically live for about 50 years, according to the United States’ National Oceanic and Atmospheric Administration.

Garside said his organization tends to whales in the Thames around once a year, but no whale had ever swum so far west up the Thames.

The rescue team included officers from the Port of London Authority, the Royal National Lifeboat Institution and the London Fire Brigade.

Spectator Daniel Magee, who recorded several videos of the whale, said he initially assumed it was a seal.

“As we got closer I saw a fin and realized it was a whale,” Magee told CNN on Sunday. “Some lock keepers hosing him down and it looked like the tide was going up so he could turn around. I realized that the whale might be injured as it started rolling on its side and thrashing about.”

Another spectator, David Korsaks, told CNN he was surprised to see anything other than birds in the area.

“It was almost disbelief and shock to see a whale where you would normally only see ducks and swans,” Korsaks said. “My next thoughts were I hope it’s ok and manages to swim free.”

Sophie Milner told CNN she took video of the whale after seeing people gathered at the scene.

“We just saw a crowd of people looking at the whale. It was being looked after by some specialists by the time we got there,” she said.

It is unusual, but not unprecedented, for whales to enter the Thames and require rescuing.

In 2018, a Beluga whale was found in the river.

And in 2006, a bottlenose whale was spotted in central London, sparking a massive operation to return her to safety. Rescuers used a crane to lift her out of the river and onto a barge. But the whale died on the barge hours later, before it could be returned to deeper water.

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